How to detect that JavaScript and/or Cookies are disabled?

Question

How to detect that JavaScript or Cookies are disabled in the user's browser and notify him any help ?

Answer 1

For checking cookies you can use:

function checkCookie(){     var cookieEnabled = navigator.cookieEnabled;     if (!cookieEnabled){          document.cookie = "testcookie";         cookieEnabled = document.cookie.indexOf("testcookie")!=-1;     }     return cookieEnabled || showCookieFail(); }  function showCookieFail(){   // do something here }   // within a window load,dom ready or something like that place your: checkCookie(); 

And for checking JavaScript use a <noscript> tag with some kind of message inside

Answer 2

Update (6/25/18):

A lot of these posts, including mine, are taking snippets from Modernizr. They will all eventually become outdated as the Modernizr code gets updated.

I think the best answer to this question should be to use Modernizr directly.

if (Modernizr.cookies) {   // supported } else {   // not-supported } 

---

Original Answer (5/11/17):

This is taken straight from Modernizr and works in more browsers than other solutions in this post.

https://github.com/Modernizr/Modernizr/commit/33f00fbbeb12e92bf24711ea386e722cce6f60cc

function checkCookie(){     // Quick test if browser has cookieEnabled host property     if (navigator.cookieEnabled) return true;     // Create cookie     document.cookie = "cookietest=1";     var ret = document.cookie.indexOf("cookietest=") != -1;     // Delete cookie     document.cookie = "cookietest=1; expires=Thu, 01-Jan-1970 00:00:01 GMT";     return ret; }